JPH0698427B2 - Method for manufacturing fluid chamber components - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid chamber component for enclosing a fluid such as oil used in a transmission of an automobile,
More specifically, it relates to a method for manufacturing a fluid chamber component having a seal ring groove formed on the outer peripheral surface.

[0002]

2. Description of the Related Art A fluid chamber component of this type is disclosed in, for example, Japanese Utility Model Laid-Open No. 64-41757, a hydraulic oil chamber forming member 136.
It is disclosed as 174,512. Conventionally, in general,
Such parts were manufactured by die casting, but in this case, the entire manufacturing equipment including the mold becomes complicated, resulting in an increase in cost.

Therefore, the present applicant has filed Japanese Patent Application No. 1-2890.
No. 72 proposes a manufacturing method of forming a seal ring groove by a rolling roller on the outer peripheral surface of a sheet metal member having a circular outer peripheral shape. The main points of the previously proposed method of manufacturing a fluid chamber component are as follows.

That is, a sheet metal member having a circular outer peripheral shape is held in a state of being constrained toward the center of the sheet metal member by a seal ring groove forming die device that rotates around the central axis of the sheet metal member. In this state, a groove forming rolling roller having an annular protrusion on the outer peripheral surface is pressed against the outer peripheral surface of the sheet metal member to form a seal ring groove for fitting a seal ring (first step). Next, the sheet metal member in a state where only the tips of the wall portions on both sides of the seal ring groove are slightly exposed is held by a radius machining die device that rotates around its central axis, and in this state, A protrusion portion that fits into the seal ring groove is provided around the outer peripheral surface, and a radius forming groove into which the tip of the wall portion exposed from the radius machining die device enters is formed as a base of the protrusion portion. The rounding rolling rollers formed on both sides of the end are pressed against the outer peripheral surface of the sheet metal member to round the tip of the wall (second step).

[0005]

In the case of the above-described method of manufacturing the fluid chamber component parts proposed by the applicant of the present invention as described above,
Compared with conventional manufacturing methods by die casting, manufacturing equipment can be simplified, manufacturing cost can be reduced, and the seal ring is not damaged when it is fitted in the seal ring groove formed on the outer peripheral surface. The effect of being able to rationally realize the rounded processing to achieve this is obtained. However, in the method of manufacturing the fluid chamber constituent parts proposed by the applicant of the present invention, two different kinds of mold apparatuses are used in the first step and the second step, so that the sheet metal, which is a component material, is used. It takes time and effort to transfer the members between the mold apparatuses, and there is room for improvement in terms of manufacturing efficiency.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method of manufacturing a fluid chamber component, which can significantly improve the manufacturing efficiency as well as the effect of rolling.

[0007]

In order to achieve the above object, in a method for manufacturing a fluid chamber component according to claim 1 of the present invention, a sheet metal member having a circular outer peripheral shape is provided. It is held in a state of being constrained in the center direction of the sheet metal member by a die device that rotates around the central axis, and in this state, the groove forming rolling roller having an annular protrusion on the outer peripheral surface is formed on the outer surface of the sheet metal member. To form a seal ring groove for fitting the seal ring, and annular walls formed on both sides of the base end of the protrusion on the outer peripheral surface of the groove forming rolling roller, on both sides of the seal ring groove. The outer peripheral surface has an annular protrusion that fits in the seal ring groove, and the base end of this protrusion has both sides of the wall of both sides of the seal ring groove. It has a radius forming groove into which the tip enters, The R-shaped rolling roller, which is arranged in parallel with the groove-forming rolling roller in the rotational direction of the apparatus at a distance, is pressed against the outer peripheral surface of the sheet-metal member that is still held by the mold device to form the wall portion. It is characterized in that the tip of is rounded.

According to a second aspect of the present invention, there is provided a method of manufacturing a fluid chamber component, wherein a sheet metal member having a circular outer peripheral edge shape is formed by a die device that rotates around a central axis of the sheet metal member. Hold it in the state of being constrained toward the center of the manufacturing member,
In this state, the rolling roller for preforming the seal ring groove having an annular protrusion on the outer peripheral surface is pressed against the outer peripheral surface of the sheet metal member to form the preparatory seal ring groove, and the preforming rolling for the seal ring groove is performed. Allow the tips of the wall portions on both sides of the preliminary seal ring groove to be received in annular groove portions formed on both sides of the base end portion of the protrusion on the outer peripheral surface of the roller, and then,
The outer peripheral surface has an annular protrusion that finish-molds the preliminary seal ring groove, and there are rounded grooves on both sides of the base end of the protrusion into which the tips of the wall portions on both sides of the preliminary seal ring groove enter. Then, the finish forming rolling roller, which is arranged in parallel with the seal ring groove preforming rolling roller in the rotational direction of the mold device at a distance, is pressed against the outer peripheral surface of the sheet metal member to form the preliminary seal ring groove. It is characterized in that it is finish-molded and the tip of the wall is rounded.

[0009]

According to the method of manufacturing a fluid chamber component according to the first aspect of the present invention, the sheet metal member is held in a state of being constrained in the center direction by the die device, and the central shaft is passed through the die device. By pressing the groove forming rolling roller against the outer peripheral surface of the rolling roller while rotating it around, the seal ring groove is formed by the annular protrusion of the outer peripheral surface of the rolling roller.
At this time, the tips of the wall portions formed on both sides of the seal ring groove are received in the annular groove portions formed on both sides of the base end portion of the protrusion of the groove forming rolling roller. Then, by pressing the rolling roller for round processing on the outer peripheral surface of the sheet metal member that rotates while being held in the mold device, an annular protrusion on the outer peripheral surface of the rolling roller for round processing is formed. While the portion fits into the seal ring groove to retain the shape of the seal ring groove from the inside, the tips of the wall portions on both sides of the seal ring groove are rounded by the round forming groove. In this way, while holding the sheet metal member in one die device and continuously rotating it about the central axis, the two rolling rollers are sequentially pressed against the outer peripheral surface of the sheet metal member with a predetermined time difference. Thus, it is possible to continuously form the seal ring groove which can be fitted without damaging the seal ring by rounding the ends of the wall portions on both sides. Therefore, it is not necessary to transfer the sheet metal member between the mold devices in the middle of the manufacturing process, so that the fluid chamber component having excellent workability and practicality and high accuracy can be efficiently manufactured.

Further, according to the method for manufacturing a fluid chamber component according to the second aspect of the present invention, the sheet metal member is held in a state of being constrained in the center direction by the die device and the die device is used to intervene. By pressing the seal ring groove preforming rolling roller against the outer peripheral surface while rotating around the central axis, the preliminary seal ring groove is formed by the annular projection on the outer peripheral surface of the rolling roller. At this time, the tips of the wall portions formed on both sides of the preliminary seal ring groove are received in annular groove portions formed on both sides of the base end portion of the protrusion of the seal ring groove preforming rolling roller. . Subsequently, by pressing the finish forming rolling roller onto the outer peripheral surface of the sheet metal member that rotates while being held in the mold device, the annular protrusion of the outer peripheral surface of the rolling roller is The preliminary seal ring groove is fitted into the preliminary seal ring groove to finish-mold it, and the tips of the walls on both sides of the preliminary seal ring groove that enter the rounded groove are rounded by the rounded groove. Thus, by holding the sheet metal member in one mold device and continuously rotating the sheet metal member around the central axis, two rolling rollers are sequentially pressed against the outer peripheral surface of the sheet metal member with a predetermined time difference, It is possible to continuously perform the preforming of the seal ring groove, the finish forming of the preformed seal ring groove, and the rounding of the tips of the wall portions on both sides of the groove. Therefore, at the stage of manufacturing, there is no need to transfer the sheet metal member between the mold apparatuses, which is excellent in workability and practicality.
Moreover, by forming the groove in two stages of preforming and finish forming, a highly accurate fluid chamber component can be efficiently manufactured.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for manufacturing a fluid chamber component according to the present invention will be described below with reference to the drawings. FIG. 1 shows a half cross-sectional view of a disk-shaped steel plate member A having a diameter D, which is an example of a sheet metal member that is a material of a fluid chamber component, and the outer peripheral edge shape of the steel plate member A in this embodiment is circular. Yes,
Further, an axial hole a1 is formed by punching in the central portion of the steel plate member A. By subjecting such a steel plate member A to a machining process described below, as shown in FIG. A disk-shaped fluid chamber component having a seal ring groove a4 formed on its surface is manufactured.

First, as shown in FIG. 2, the steel plate member A as shown in FIG. 1 is exposed at its outer peripheral edge portion a2 by the upper die 1A and the lower die 1B of the outer peripheral edge portion molding die device 1. Hold in the state. The upper die 1A and the lower die 1B of the outer peripheral edge portion molding die device 1 rotate counterclockwise (in the direction of arrow L in the figure) around a die center line cl coaxial with the center of the steel plate member A. . In addition, 2 is a cylindrical mold member that fits into the recess 1C formed in the center of the upper mold 1A and the lower mold 1B and fits into the shaft hole a1 of the steel plate member A. Movement of the steel plate member A toward the center thereof is restricted and restrained.

In this state, as shown in FIG. 3, the outer peripheral edge forming rolling roller 3 having an annular concave groove 3a formed on the outer peripheral surface thereof is provided in the concave groove 3a. Is moved inward in the radial direction so as to insert. The rolling roller 3 is arranged around the mold apparatus 1 and rotates clockwise about the central axis cl3 (in the direction of the arrow R in the figure), that is, in the direction opposite to the mold apparatus 1. While rotating, it can be brought into contact with and separated from the peripheral edges of the upper mold 1A and the lower mold 1B, that is, the outer peripheral edge of the steel plate member A held between them. The groove 3a formed in the rolling roller 3 has a predetermined depth and width. Such a rolling roller 3 is moved toward the center side of the steel plate member A until the bottom of the concave groove 3a abuts on the outer peripheral surface of the steel plate member A, and from there, further pressed against the steel plate member A. As a result, as shown in FIG. 3, the entire surface of the outer peripheral edge portion a2 of the steel plate member A that has entered the groove 3a is in close contact with the inner wall of the groove 3a having a predetermined depth and width. become. In this way, the surface of the outer peripheral edge portion a2, that is, the outer peripheral surface and both side surfaces are molded without any unevenness. As a result, the steel plate member A1 is obtained in which the thickness dimension of the outer peripheral edge portion a2 and the overall diameter dimension are formed as set. The diameter dimension of the steel plate member A1 is set to be slightly smaller than the dimension after the product is completed, taking into consideration the enlargement of the diameter dimension due to the formation of the seal ring fitting groove described later.

Next, as shown in FIG. 4, instead of the mold apparatus 1 for molding the outer peripheral edge portion, a seal ring groove forming metal which rotates counterclockwise around a central axis cl similar to that of the mold apparatus 1. The steel plate member A1 is held by the upper mold 4A and the lower mold 4B of the mold device 4, and the movement of the steel plate member A1 toward the center is restricted. The upper die 4A and the lower die 4B have the same diameter as the steel plate member A1 or a slightly larger outer diameter. In this state, as shown in FIG. 4, an annular protrusion 5'a is provided around the outer peripheral surface, and annular grooves 5'b, 5'b are formed on both sides of the base end of the annular protrusion 5'a. The rolling roller 5'for preforming the seal ring groove having the 5'b formed thereon has its central axis cl.
The protrusion 5'a is pressed against the outer peripheral surface of the steel plate member A1 while rotating clockwise about 5 '(direction of arrow R in the figure), that is, in the direction opposite to the mold device 4. A preliminary seal ring groove is formed by moving the preliminary seal ring groove inward in the radial direction, and the diameter of the preliminary seal ring groove is enlarged to form a preliminary seal ring groove. The front end portions of the walls on both sides of the preliminary seal ring groove formed so as to extend in the direction of are received in the annular groove portions 5'b and 5'b. After this molding, the seal ring groove preforming rolling roller 5 ′ is retracted so as to be separated from the mold device 4.

Next, as shown in FIG. 5, an annular protrusion 5a having a rectangular cross section is provided around the outer peripheral surface, and annular grooves 5b, 5b are formed on both sides of the base end of the annular protrusion 5a. The rolling roller 5 for groove formation on which the central axis c is formed.
Rotating in the right direction (arrow R direction in the figure) with 15 as a rotation axis, that is, in the radial direction so that the protrusion 5a is pressed against the outer peripheral surface of the steel plate member A1 while rotating in the direction opposite to the mold device 4. The seal ring groove a4 for fitting the seal ring is formed by moving the seal ring groove inwardly, and the diameter of the seal ring groove a4 is enlarged to form the seal ring groove a4. Walls a on both sides of the seal ring groove a4 that are formed to extend outward
5, the tip portions a6 and a6 of the a5 are the annular groove portions 5b and 5
Accepted by b. After this molding, the groove forming rolling roller 5 is retracted so as to be separated from the mold device 4.

Subsequently, as shown in FIG. 6, an annular projection 6a having a substantially rectangular cross section that fits in the seal ring groove a4 is provided around the outer peripheral surface, and the base of the annular projection 6a is provided. The seal ring groove a4 is provided on both sides of the end portion and the wall portions a on both sides of the seal ring groove
Rounded grooves 6b, 6b into which the tips a6, a6 of the grooves 5, 5 enter are formed, and, as shown in FIG. 7, the groove forming rolling roller around the mold device 4 in the rotation direction thereof. 5, the rounding roller 6 for R-working arranged side by side with a space therebetween while rotating clockwise about the central axis cl6 (direction of arrow R in the drawing), the die ring forming die device 4 By moving the annular projection 6a inward in the radial direction so that the annular projection 6a fits in the seal ring groove a4 on the outer peripheral surface of the steel plate member A1 that is still held by the upper mold 4A and the lower mold 4B. Due to the rounded groove portions 6b and 6b, the tip portions a of the wall portions a5 and a5 on both sides of the seal ring groove a4.
Rounding is performed to round the corners of 6 and a6. After this molding, the rolling roller 6 for R-working is retracted so as to be separated from the mold device 4.

As described above, the forming of the seal ring groove a4 and the rounding of the tips a6 and a6 of the wall portions a5 and a5 on both sides of the seal ring groove a4 after that can be performed by the rolling rollers 5 and 6. And the die unit 4 which becomes the inner die during the groove formation and the rounding.
No need of transferring the steel plate member A1 between different mold apparatuses, and simply pressing the two rolling rollers 5 and 6 with a predetermined time difference.
A disk having a seal ring groove a4 having a predetermined shape on the outer peripheral surface thereof, which allows the seal ring such as an O-ring to be smoothly fitted without being damaged by contact with the tips of the walls a5 and a5. -Shaped fluid chamber components can be efficiently manufactured.

In the above embodiment, the case where the disk-shaped fluid chamber component is manufactured has been described, but the invention can be applied to the manufacturing of a cup-shaped cup-shaped fluid chamber component made of a steel plate. In this case, by preparing a mold device having a shape suitable for the case, it is possible to manufacture by a method similar to the above.

Further, in the above embodiment, the seal ring groove a
As a pre-process of the forming process of No. 4, as shown in FIG. 2 and FIG. 3, a process of forming the outer peripheral edge portion of the steel plate member A by the mold device 1 and the rolling roller 3 is provided. However, such a molding step is not necessary.

9 to 11 show another embodiment of the method for manufacturing a fluid chamber component according to the present invention, which will be described below in the order of steps. First, as shown in FIG. 9, the upper die 4A and the lower die 4B of the mold device 4 for forming the seal ring groove.
By holding the steel plate member A1 by the
Constrain movement of 1 toward the center.

In this state, an annular projection 5a1 having a substantially triangular cross section is provided around the outer peripheral surface, and annular grooves 5b1 and 5b1 are formed on both sides of the base end of the annular projection 5a1. Rolling roller 51 for preforming seal ring groove
Is rotated clockwise about the central axis cl51 (direction of arrow R in the figure), that is, while rotating in the opposite direction to the mold device 4, the protrusion 5a1 is pressed against the outer peripheral surface of the steel plate member A1. Thus, the preliminary seal ring groove a41 is formed by moving it inward in the radial direction, and the diameter of the mold apparatus 4 is expanded by the expansion of the radial dimension accompanying the formation of the preliminary seal ring groove a41. The front end portions a6 and a6 of the wall portions a5 and a5 on both sides of the preliminary seal ring groove a41 formed so as to extend outward from the outer peripheral surface are received in the annular groove portions 5b1 and 5b1. After this molding, the seal ring groove preforming rolling roller 51 is retracted so as to be separated from the mold device 4.

Subsequently, as shown in FIG. 10, an annular projection 6a1 having a substantially rectangular cross section for finishing forming the preliminary seal ring groove a41 is provided on the outer peripheral surface, and
On both sides of the base end portion of the annular protrusion 6a1, the tip portions a6, a6 of the wall portions a5, a5 on both sides of the preliminary seal ring groove a41 are formed.
Are formed to form rounded grooves 6b1 and 6b1
In addition, as shown in FIG. 11, the finish forming rolling roller 6 is provided around the die device 4 in the rotational direction thereof in parallel with the preliminary seal ring groove forming rolling roller 51.
1 is rotated clockwise about the central axis cl61 as a rotation axis (in the direction of the arrow R in the figure), while the steel plate is still held by the upper mold 4A and the lower mold 4B of the seal ring groove forming mold device 4. On the outer peripheral surface of the member A1, by moving the annular protrusion 6a1 inward in the radial direction so as to fit the preliminary seal ring groove a41, the annular protrusion 6a1 finish-forms the preliminary seal ring groove a41. To form a predetermined seal ring groove a4, and to form the rounded groove portion 6
Rounding is performed by b1 and 6b1 to round the corners of the tips a6 and a6 of the walls a5 and a5 on both sides of the seal ring groove a4. After this forming, the finish forming rolling roller 61 is retracted so as to be separated from the mold apparatus 4.

As described above, also in the case of the embodiment shown in FIGS. 9 to 11, the formation of the seal ring groove a4 and the tips of the wall portions a5 and a5 on both sides of the seal ring groove a4 after that are formed. Only one die device 4 is required as the inner die at the time of rounding the parts a6 and a6, and the steel plate member A1 is used.
There is no need to transfer the molds between different mold apparatuses at all, and the two rolling rollers 51, 61 are sequentially pressed with a predetermined time difference, and the outer peripheral surface thereof has a predetermined shape and an O-ring or the like. The seal ring is attached to the walls a5, a
It is possible to efficiently manufacture a disk-shaped fluid chamber component having a seal ring groove a4 that can be fitted smoothly without being damaged by the contact with the tip of 5.

[0024]

As described above, according to the invention of claim 1, since the fluid chamber constituent parts are manufactured by rolling, the manufacturing equipment is simplified as compared with the conventional general manufacturing method by die casting. In addition to being able to reduce the manufacturing cost, it is possible to reasonably realize the rounding process to prevent the seal ring from being damaged when it is fitted into the seal ring groove formed on the outer peripheral surface. While holding the sheet metal member in one mold device and continuously rotating the sheet metal member around the central axis, the two rolling rollers are sequentially pressed against the outer peripheral surface of the sheet metal member with a predetermined time difference, and the seal ring groove is formed. And the rounding of the tips of the walls on both sides of the seal ring groove can be performed continuously.Therefore, during the manufacturing process, the sheet metal member can be transferred between the mold units. Obtain labor becomes completely unnecessary,
The manufacturing efficiency of a predetermined fluid chamber component can be increased.

According to the second aspect of the present invention, the formation of the seal ring groove and the rounding of the tips of the wall portions on both sides of the seal ring groove can be continuously performed by using one die device. It is possible to increase the manufacturing efficiency of a predetermined fluid chamber component, and improve the processing accuracy of the seal ring groove by forming in two stages, preforming and finish forming.
High quality fluid chamber components can be manufactured.

[Brief description of drawings]

FIG. 1 is a half sectional view of a sheet metal member which is a material of a fluid chamber component.

FIG. 2 is a cross-sectional explanatory view of an essential part showing a state in which a sheet metal member is sandwiched by an outer peripheral edge molding die device in the manufacturing method according to the embodiment of the present invention.

FIG. 3 is a cross-sectional explanatory view of a main part showing a molding process of an outer peripheral edge part.

FIG. 4 is a cross-sectional explanatory view of a main part showing a step of forming a preliminary seal ring groove.

FIG. 5 is an explanatory cross-sectional view of a main part showing a step of forming a seal ring groove.

FIG. 6 is a cross-sectional explanatory diagram of a main part showing a rounding process for the tips of the wall portions on both sides of the seal ring groove.

FIG. 7 is an explanatory plan view showing a positional relationship between a mold device and each rolling roller.

FIG. 8 is a sectional view of an essential part of a disk-shaped fluid chamber component.

FIG. 9 is a cross-sectional explanatory view of the essential parts showing the step of forming the preliminary seal ring groove in the manufacturing method according to another embodiment of the present invention.

FIG. 10 is a cross-sectional explanatory view of the essential parts showing the finish forming of the preliminary seal ring groove and the rounding process for the tips of the wall portions on both sides of the groove.

FIG. 11 is an explanatory plan view showing the positional relationship between the mold device and each rolling roller.

[Explanation of symbols]

 A, A1 Steel plate member (sheet metal member) a2 Outer peripheral edge part a4 Seal ring groove a41 Preliminary seal ring groove a5 Wall part a6 Tip part 4 Seal ring groove forming die device 5 Groove forming rolling roller 5a, 5a1, 6a , 6a1 Annular protrusion 5b, 5b1 Annular groove 6,6 Rolling roller 6b, 6b1 R-working groove

Claims (2)

[Claims] 1. A sheet metal member having a circular outer peripheral edge shape,
The sheet metal member is held in a state of being constrained in the center direction of the sheet metal member by a die device that rotates around the central axis of the sheet metal member. The seal ring groove for pressing the seal ring is formed by pressing the outer peripheral surface of the manufacturing member, and the seal ring is formed in the annular groove portions formed on both sides of the base end portion of the protrusion of the outer peripheral surface of the groove forming rolling roller. It makes it possible to receive the tips of the walls on both sides of the groove, and then has an annular protrusion on the outer peripheral surface that fits into the seal ring groove, and the seal ring groove is provided on both sides of the base end of this protrusion. A round processing rolling roller, which has a rounded groove into which the tips of the wall portions on both sides enter, and which is juxtaposed with the groove forming rolling roller in the rotational direction of the die device at a distance from the die, On the outer peripheral surface of the sheet metal member that is held by the device Method for producing a fluid chamber components characterized by Earl machining the tip of the wall portion put to. 2. A sheet metal member having a circular outer peripheral edge,
The sheet metal member is held in a state of being constrained in the center direction of the sheet metal member by a die device that rotates around the central axis of the sheet metal member, and in this state, a seal ring groove preforming rolling having an annular protrusion on the outer peripheral surface. The roller is pressed against the outer peripheral surface of the sheet metal member to form the preliminary seal ring groove, and the seal ring groove is formed in the annular groove portion formed on both sides of the base end portion of the protrusion of the outer peripheral surface of the preforming rolling roller. It is possible to receive the tips of the wall parts on both sides of the preliminary seal ring groove, and then there is an annular protrusion on the outer peripheral surface for finish-molding the preliminary seal ring groove. It has a rounded groove into which the tips of the wall parts on both sides of the preliminary seal ring groove enter, and for finish forming in parallel with the seal ring groove preforming rolling roller in the rotational direction of the mold device at a distance. Plate rolling roller With molded finish the preliminary seal ring groove against the outer circumferential surface of the manufactured members, the manufacturing method of the fluid chamber components characterized by Earl machining the tip of the wall portion.